There are many causes of dry mouth and the medication varies from person to person and must be treated symptomatically according to the specific cause. The common cause of dry mouth is Schelgren’s syndrome, which is also known as dryness syndrome. The main manifestations are dry mouth and dry eyes, etc. It is a disease of the autoimmune system. You can keep your mouth moist by gargling with a mouthwash. Keep the mouth clean and reduce the occurrence of bacteria. Chinese herbal medicine can also be administered, such as Liu Wei Di Huang Wan. Dry mouth may also be a viral infection caused by the cold, you need to carry out antiviral treatment, you can take oral Shuanghuanglian oral liquid, and drink more water, three thousand milliliters of water every day, usually eat more vegetables and fruits, avoid spicy and stimulating food, wear a mask outside, do a good job of protection. Avoid staying up late, eat a light diet, and eat more fruits such as pears and watermelon. Dry mouth may also be related to menopause, you can eat some drugs to improve immunity, such as transfer factor. Or take oral vitamin B12 for treatment. Dry mouth may also be related to systemic diseases, such as diabetes. It may also be related to fire, you can drink water with lotus seed heart. Therefore, it is necessary to find out the cause of dry mouth, regulate the immune system, prevent infection, and make appropriate dietary or medication regimen.